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i
<br /> Benzene 3,030
<br /> tToluene 8,020 MW11
<br /> • N Ethylbenzene 2,440 (riot located to scale)
<br /> Groundwater Xylenes 9,010 Benzene 400 Benzene 102 Benzene 175 (N M)
<br /> GW Flow Direction TPH-g 62,600 Toluene 32 Toluene 675 Toluene 1 7
<br />' 0 25 50 Gradient = 0 005 MTBE (8021) 250 Ethylbenzene 18 Ethylbenzene 3,220 Ethylbenzene 0 7
<br /> MTBE (8260) <5 Xylenes 91 Xylenes 11,700 Xylenes 31
<br /> Scale(feet) TPH-g 2,280 TPH-g 47,200 TPH-g 1,030 E
<br /> Benzene 68 9 MTBE (8021) 139 MTBE (8021) 127 MTBE (8021) 97
<br />' Toluene 196 MTBE (8260) <0 5 MTBE (8260) <0 5 MTBE (8260) <05 (-1402)
<br /> Ethylbenzene 106 �MW13
<br /> Xylenes 462
<br />' TPH-g 1,400 Benzene 1,720
<br /> MTBE (8021) 637 Toluene 1,610
<br /> MTBE 8260 <0 5 Benze+e 122
<br /> ( ) Ethylbenzene 418 �
<br /> Xylenes 1,360 Toluene 366 Benzene <0 5
<br />' Benzene 675 TPH-g 18,900 G�P�EP 4 Ethylbenzene 162
<br /> Toluene <0 5
<br /> Toluene 675 MTBE (8021) 78 9 �pSp\1P Xylenes
<br /> 134 Ethylbenzene <0 5
<br /> MTBE (8260) <0 5 'g 2, Xylenes <0 5
<br /> Ethylbenzene 3,980 NE MTBE (8021) 94 TPH-g <50
<br /> Xylenes 16,900 MTBE (8260) <0 5
<br />' MTBE (8021) <25,D00 i Ros�N1PR MTBE (8021) <0 5
<br /> N\ OF- ANIr
<br /> Benzene 170 MW12
<br /> Toluene <0 5ESS�010, MW10 (NM�
<br /> Ethylbenzene <0 5 pRo p�N
<br /> Xylenes <0 5 6
<br /> Benzene 10,000
<br />' MW9 TPH-g 127 RW4 Toluene 19,400
<br /> (-1191) MTBE (8021) 0 8 (-1328) Ethylbenzene 3,750
<br /> MTBE (8260) <0 5 V3 (-13 11) Xylenes 16,500
<br />' TPH-g 140, 100
<br /> SEN Benzene 1 70 LPH 0 01 PSV1 UVE3-MW2 (shallow)(-12 75) LPH 0 01 MTBE (8021) 650
<br /> MTBE (8260) , <5
<br /> Toluene <0 5 (-1238) UVB
<br /> Ethylbenzene <0 5 RW2 (-1257) UVB-MW1 (deep) (-13 06)*
<br />' Xylenes <0 5 5 SW2 A!�r MW6 (Dry) Benzene 1,190
<br /> PSV2 Toluene 104
<br /> MTBE (8 21) 126 (_12 16)"" RMER V11' Ethylbenzene 402 LEGEND
<br />' MTBE (8260) 130 pt•1K (-1252), Xylenes 109
<br /> MW4 �` 0_0 ti LPH. 0 01 TPH-g 5,820 Benzene + 6,960 GROUNDWATER MONITORING WELL
<br /> Z ti \ V2 MTBE (8021) 139 Toluene 21,000 . PIEZOMETER
<br /> � & P1 �ti SWI _ �, (-1260) MTBE (8260) <0 5 Ethylbenzene 3,340
<br />' _ (NM) MW2 ti , RW1 Xylenes 13,700 VAPOR EXTRACTION WELL
<br /> �
<br /> _ 1
<br /> (-1220) +V4_ (-1239) (-12 57}1 TPH-g 113,000 RECOVERY WELL
<br /> m 12 07 (-12 33) '�+ (_M2 43} ��� MWort( 12 39) Benzene 147 MTBE (8021) <25 PERMANENT SOIL VAPOR MONITORING WELL
<br /> Benzene 140 1 IW1(- ) ,- Toluene 897 1
<br />' Toluene 1 7 + �� �\ I T AIR SPARGING WELL
<br /> Ethylbenzene 54 ? • P2r,1 �� ti �, FpRME N , Ethylbenzene 239 I
<br /> y Xylenes 07 1 (N�� +� '\iti tis SIP" NG `�' � Xylenes 349 E INJECTION WELL
<br /> TPH-g 1,450 q � + MSR 10V ,� �� R MTBE (8021TPH-) 5,140 44 2 (-1239) Groundwater Elevation (feet)
<br />' MTBE (8021) 40 G MW7 FpR p �v - F0
<br /> MTBE (8260) <0 5 2 (A 1 94) PV Nps ' ocso-K MTBE (8260) <0 5 (NM) Not Measured
<br /> G 15�-p C lit Not Used to Determine Gradient
<br /> Benzene 339 to Benzene 570 Benzene <0 5 I TPH-g Total Petroleum Hydrocarbons as gasoline
<br />' Toluene 143 ul N M164 MW1 _ Toluene 61 Toluene <0 5 MTBE Methyl t-butyl ether
<br /> Ethylbenzene 780 Tk i y ( ) (-11 91) Ethylbenzene 90 Ethylbenzene <0 5
<br /> Xylenes 1,520 �� _f �- Xylenes 11 1 Xylenes <0 5 LPH Liquid-phase hydrocarbons (feet)
<br /> TPH-g 8,410 TPH-g 1,270 TPH-g <50
<br /> MTBE (8021) 14 4 Z MTBE (821) 163 MTBE (8021) <0 5 Note
<br /> I
<br /> . MTBE (8260) 5 00 MTBE (8260) <0 5 Analytical results in micrograms per titer(ug/L)
<br /> SITE PLAN SHOWING GROUNDWATER ELEVATIONS AND ANALYTICAL RESULTS FIGURE
<br /> Q �� FORMER EXXON RS 7-3942
<br /> 4444 NORTH PERSHING AVENUE, STOCKTON, CALIFORNIA
<br /> ET
<br /> ERING
<br /> 8 DECEMBER 2003
<br /> 4 _
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